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Any of several flowering plants, including the Texas bluebonnet (Lupinus subcarnosus), a North American annual legume native to the plains of Texas. About 1 ft (0.3 m) tall, it bears silky-haired compound leaves and clusters of purplish blue flowers marked in the centre with white or yellow. In the spring it covers immense areas in southern and western Texas like a blue carpet. It is one of the most popular wildflowers of Texas. In Scotland the name is given to the bluebottle (Centaurea cyanus) and to the blue scabious, or devil's bit (Succisa pratensis).
This entry comes from Encyclopædia Britannica Concise. For the full entry on bluebonnet, visit Britannica.com.